Class 3 items have risen astronomically. I remember $1200 Colt 635s and $1800 Mp5 (late 80's). The last Colt 635 I saw was listed for $18,599 and I personally know of two Mp5 RR that sold for $11k and $12k.

A guy I hung out with in the 2000 time period bought his West Hurley TSMG for $3500 (I passed on it because it was $500 too high at that time). He had it for sale about 12 months ago for $10k.