Both Rancilio and the Bezzera retain high resale value. If you are looking at value, you may want to consider this point.
I think for first hand prices, the Bezzera is very much worth it. Do your dialing right, it will serve you great.
Rancillio Silvia, unless getting good second hand (and in good condition), it is still worth the penny as its full 58mm, though the only big concern is the steam is finicky as hell (If you can master this and get great froth, you'll be a master in any other machine).

