Classic & Vintage - schwinn identification

I am new here so I apoligize if this is in the wrong place or has already been posted...

Does anyone know what model/yr. this Schwinn is?http://newyork.craigslist.org/brk/bik/822896935.html
http://newyork.craigslist.org/brk/bik/822896935.html

Also, I am debating whether I should buy this for roughly $100 and turn into single speed or if I should just bite the bullet and buy a new one I am looking at for about $400. Basically, I am not sure how much $$ goes into the conversion process. Again, sorry if this has been posted before.

Thanks!

That Schwinn is 20 - 30 years old (not that it's a bad thing) and $100 is on the high side for that bike.

From the CL add it is difficult to determine which model, but this '81 World Sport looks about right.

http://www.trfindley.com/flschwinn_1980_1990/1982_13.html

If so, the frame is on the heavy side, but would convert to a beater SS/FG nicely. But your concern about the conversion price is well founded. New aluminum rimmed wheels to replace the steel rimmed originals would set you back about $100-200. New brake pads, cables, tires, and bar tape, another $50-75. If you can live with that saddle, OK, but most of us would find it to be a real PITA (literally).

So, by all means you are nearly at $400, so think carefully before you buy the World Sport. Best of luck.

This bike seems to be an 80's model, I think Schwinn's built between the late 60's and late 80's have serials on the left rear dropout like my Varsity. You can then look up the number for the Month and year that the frame was manufactured.

Thanks!