I have these four chips available at $310 each which, I can not sell for any less, since many have sold at that level during the past several years... and it would be unfare to those buyers if I offered them for less. Though, sometimes, one or two of these turn up for a lot less when being sold by someone who paid much less prior to the $300 level being reached.

I will also trade for Ivory or MOP in that range.