Frames are probably the least valuable part of a Servi-Cycle. As you can see above, they are easy to find and plentiful. Motors on the other hand are much more scarce and valuable. I've been offered rusty frames with forks and wheels for free, and turned them down. Good seats, headlights, handlebars, rear wheel pulleys. These parts are worth a little, as they are needed. Fuel tanks in good condition are worth keeping. Unless you are looking at a good frame with wheels, seat and gas tank, and you either have a motor, or intend to put a Briggs or Tecumseh or Honda or something similar in it, save your money.