I too have a Schwinn 754 Pearl White
I got one from a garage sale for $100 in perfect condition. One thing on the bike that threw me was the front deraileur shifter has an indexer adjustment. you can set it for firm, light, or no indexing. I thought it was broken until I started looking at it.
Nice, light, and fast. Just saw one for sale on Kijiji for $540 1989 Vintage in blue.