- The customers send details of their translation project to receive a quote.
- The quote is calculated considering the lowest bid estimated for the project.
If the customers still thinks that's too much (and who won't, at that point?) they can "Name their price".
In that case,
- The customers place their order, and automatic bidding starts. Once someone desperate enough to work at the price set by the customer (or lower, I imagine, to "win" the bid) is found, the translation supposedly gets done.
- If they cannot find a translator willing to work for peanuts (but I bet they will: "There's a sucker born every minute", as P.T. Barnum used to say), then they say the customer gets a refund.