Don't know exactly what to call it, but I'm trying to figure out whether something exists that more or less supports the following scenario:
From time to time, a company will have some extra inventory they want to sell. Normally they try to sell it to CompanyA, but if A isn't interested then seller tries a handful of specific companies at a lower price. If not interested or all the inventory isn't called for, then go to another tier at a lower price, etc. These companies/types are predetermined. For all of these, the buyer's experience is simply email. It doesn't look like a marketplace and as far as they know, they're the only one getting the offer.
The system tracks their responses so the seller has a simple interface into the process instead of tons of different threads.
Does something like this exist?