Big block k-frame value

I just sold a 69 A-body Big Block K-frame with a new idler arm for 350.00 I also had the left engine mount bracket with the engine mount that was all NOS I wanted 225.00 for it and the guy passed on that but three days later the guy called and wanted to buy that as well but I had already sold it. I think it was a fair price and so did the people that bought the stuff there was no question about price. By the way I do have 2 NOS left side engine mounts if anyone needs one but no more engine mount brackets.