Have you posted on craigslist?
You can usually get used rollers for $50.00 or less and a used trainer for under $100. I could have purchased 4 used rollers for $50 or less and 6 used trainers for under $75, when I posted up about it 2 months ago on our local craigslist site.
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2007 Jamis Ventura Comp
2006 Jamis Explorer 2.0
2000 Specialized Hardrock (bought used)
Swim, Bike, Run and sounds like fun