Value of Trooper Mk III in 22lr

[D1911]

I recently found a 4" blued Colt Trooper Mk III in 22 lr for sale on consignment. The gun is unfired and has the factory wood target grips, but no box. It has one small mark on the rib, but is otherwise perfect. It's pretty cool and I haven't actually seen one of these in years so I have it on hold. Any idea as to a good price? Thanks.