All my little black plastic ashtrays got tossed.
The glass ashtrays I have were collectors items when I got them (Mikasa, Waterford, Fenton, etc) so they are in storage, for the most part, until I get the motivation to photograph them and put them on Ebay.
A couple of the REALLY nice ones I have re-purposed as a valet on my dresser, or as a stand to display some of my PVs on the coffee table...