+1 Your bike does not have a cassette, unless someone upgraded the wheels earlier.
By 1979, Motobecane was moving to Swiss threaded bottom brackets. Absolutely no impact on a wheel change, but will affect choices if you decide to upgrade/change out crankset.
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Please don't confuse ebay "asking" prices with "selling" prices. Many sellers never get their ask price. some are far from it. Value is determined once an item actually SELLS. Its easy enough to check SOLD prices.
Last edited by wrk101; 11-09-12 at 10:12 AM.