I've gone through several pumps (a large plastic Zefal Double shot, a Blackburn), but my 30 year old Silca made with Columbus tubing and a wooden handle soldiers on. Just greased the leather gasket for the first time this year, and replaced the head gasket, works good as new and I think I paid $80 for it back in the 80's.
I also use a full size frame pump, a Blackburn that's probably 15 years old. Can't get parts for it but it keeps on working.