AMT 10mm magnum

Hello,

I have an Amt 10mm magnum in original box that i want to sell, what would be a fair value for the gun??
It lacks information (10mm mag or .45 win mag) on the magazine's and it has a 45 win mag slide with 10mm mag barrel (6 5/8)
It includes the original box some spare parts ( barrel bushing, extractor, spring and more) 3 magazine's and 400 pieces of brass (350 unused)
Thanks,

Daan