Guides / For Machine Shops

What a Group Buy Customer Actually Needs From You

September 25, 2026

Most of your customers answer to a purchasing manager. This one answers to a public forum.

A group buy organiser has run an interest check, opened a buy window, taken money from somewhere between fifty and five hundred people, and published a ship date. They are usually one or two people, they are often doing this alongside a job, and every week of your schedule is a week they have to explain.

That changes four things about the work. None of them are difficult, and all of them are worth understanding before you quote.

One: the date is part of the specification

On an industrial job a two week slip is an email. Here it is a public announcement, refund requests and a reputation that does not recover.

So treat the date the way you treat a tolerance. Quote prototype, production and finishing lead times as three separate numbers. Ask your anodiser before you commit, because that is the phase most likely to move and the one you control least.

Then, and this is the part that earns you the next job: tell them early when something slips. A customer who hears in week three that anodising is running two weeks long has options. A customer who hears in week eleven has an apology to write. Communities forgive delays that arrive with a photograph and an explanation. They do not forgive silence.

Two: the quantity is not fixed when they first ask

They will come to you before the buy closes, because they need a price to set the price. The number they give you is a hope, not an order.

Quote at three quantities without being asked. Fifty, a hundred and fifty, three hundred is a reasonable spread. It costs you almost nothing and it does two useful things: it lets them set a realistic minimum for the buy, and it means you do not have to requote when the real number arrives.

Say clearly how long the quote holds and what happens if the quantity lands outside the range. Metal moves, and a price given in January against a run that closes in April needs a stated basis.

Three: they need content, not just parts

They have to post updates. Photographs of your machine cutting their case, a shot of the first article, a picture of the anodising rack are all things they will use, and things that make the wait tolerable for the people who paid.

This costs you two minutes with a phone. It is the cheapest marketing available to a shop in this niche, because those posts are public and they are read by every other designer planning a run.

Agree one thing first: whether the design is public yet. Many are not, and posting a photograph of an unreleased case is a serious problem. Ask before you post anything, and sign the NDA if they offer one.

Four: they are not engineers, and they are not stupid

Most organisers are designers or enthusiasts who learned CAD to make the board they wanted. They will not know what a setup is, why a blanket tolerance is expensive or what anodising does to a tight pocket.

They will, however, happily change the model to save money, immediately, because it is their own design and there is no change control board.

That combination makes them one of the most rewarding customer types to do a DFM review for. Tell them the undercut on the rear face adds a setup, or that the plate pocket will close up after coating, and they will fix it that evening. Try that with an automotive tier one.

So spend the thirty minutes. It buys goodwill, a cheaper part to make, and a customer who now believes you know something they need.

The four things that protect both sides

A written cosmetic standard. Zones, viewing conditions and defect limits, agreed before production. Without it the inspection bar moves after the parts exist. Ask for one, and if they do not have one, point them at a template.

An approved golden sample. One physical part that defines the colour and the finish, held by both of you. When somebody says a batch looks light in month five, the sample answers rather than the email thread.

A stated overage. Cosmetic parts scrap and anodised parts cannot be reworked. Put a number in the quote and agree who carries it and what happens to spares. Most organisers want the spares, because units get damaged in transit.

Changes priced from the first one. One prototype round is expected. Everything after the drawing is approved is a new quote. Say it once, early, warmly, and the pattern never forms.

What you get out of it

Small piece counts, reasonable values because the parts are finished, and customers who answer email within the hour.

And a community that talks. This is a small niche with public forums and Discords where designers compare notes constantly, including on which shops delivered. A shop that ships a run on time gets named by the organiser in a public update read by every other person planning one.

There are very few industries left where doing the job properly is this directly visible. That is the actual opportunity here, and it is worth more than the margin on any single run.

If you want requests that already arrive with a spec and a date, see what we look for.

Frequently asked questions

Keep reading

• Should Your Shop Run Anodising In House?
• Why Your Anodiser Decides Whether You Keep This Work