There are several parts you do shouldn't trust off of eBay, with a shifter being one of them.
Go with a reputable one, or look on CR or the forums for a good used shifter.
I bought my Pro 5.0 for my T45 for $50 used, and it looked brand new....I havent had a problem with it other than setting the handle were I want it.
If you like notchy go with Pro 5.0 or the Steeda ones. The MGW gives you the Corvette like smoothness in shifting, but I have heard they aren't as good as the Pro 5.0's or Steeda's when your at the track...