Funny - I have the exact opposite opinion as I've been building up my collection (and thanks to you for several of them!). My Kube collection has become one of my favorites and while it is expensive, it's also a lot more exciting every time something new comes out.
As for prices, I think the demand on most of these has fallen over the last year or two - certainly on the basic waves anyway. These used to be fairly consistent at $50-60 per set, but you can get a lot of the basic series sets of 6 for half that. Many of the exclusives seem to be going for $10-20 less as well. There is a very limited market of people interested in these and many of us are caught up with what we want, so that's not helping. On top of that, some die hard collectors are selling off their collections and that's made more supply than what we've had in the past. I know I've gotten some great deals on chase figs over the last year just working with guys like yourself who are downsizing.