Less boring: http://www.nashbar.com/bikes/Product_10053_10052_173072_-1___202382
More boring: http://www.nashbar.com/bikes/Product_10053_10052_556272_-1___202382
Both get decent reviews.
As usual, Bezos and his delivery drones are the cheapest prices...starting around $50 for a mag unit. Hell, you can buy the three cheapest units on Amazon for what an average mail order unit from the bike outfits run. If you have Amazon Prime...you'll be riding tomorrow for $4!
http://www.amazon.com/s/?ie=UTF8&keywords=bicycle+trainer&tag=googhydr-20&index=aps&hvadid=3972399235&hvpos=1t1&hvexid=&hvnetw=s&hvrand=1656007861145624084&hvpone=&hvptwo=&hvqmt=b&hvdev=c&ref=pd_sl_by1rbydxh_b