First, you're new. You should have offered some form of reference to someone you have done business with in the past, E-bay, another gun board. If that's not possible, keep the ads more low key, more internet trouble has started with unknown folks selling hyped wares...
Second, Fire sale with no fire sale prices. I don't own any cartridge revolvers so no comment there. The BHP was 100 too high, I have 2 FN MKII's, not quite as nice as yours, but both came with a FN 13rd mag, 1 for 400, the other for 390. This from a pawn shop. The Gold Cup? Most folks don't get too spooled up about SR80 GC's. No sense having a target 1911 and then gooning up the trigger with that un-needed firing pin block. I might pay 700 if I had to have it, tops.
Most problematic was the fact that you backed out of your sale. I checked back to see how you were doing and the offer was closed. That makes me leery of future deals, "maybe this guy will agree to sell and then decide not to." Leave the ad up, bump it to the top, add more accessories or drop the price if it doesn't move. This board is a great resource, give it a chance.
I read the F/S boards everyday not because I am buying, but to keep up with what the market is.