The 7400 came in several versions, from 6 speed dt to 8 speed STI. I've got the 6 speed on a Paramount, and the 8 speed on my Tommasini. I really like the 8 speed.
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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.