I've browsed the ads for the last 3 months, and have decided to offer $350 for a 10" f/5 Dobsonian. Must be equivalent quality wise to a GS or XT10 (either of these will do, and if you don't know what GS is, it's sold by Hardin, antares, OPT, ect.) If you have a coulter, I will consider it, but it must be in good condition, or you should be willing to get less. Also if your far away and it needs to be shipped, then I'll offer $400 to include shipping. Ideally you would have bought the scope to see mars, then not used it much if at all after that.
Hopefully you are selling for a positive reason (aperture fever?). Thanks.
P.S. if you have parts, or a kit, to build a 10" I'd consider that also.