Nah, that's just how EBay bidding works. If the current price is 50.00, and you bid 100.00 it might go to 51.00 (depending on the minimum bid increment), then someone comes along and bids 55.00 but you're still the high bidder with your initial 100.00 bid, so it automatically bids 56.00 for you, and so on and so forth. I love a conspiracy mate, but this aint one. Cheers, Terry. 
I've never purchased from ebay so I have no idea how it works. I stick with craigslist and/or paying full price from where ever seems quickest. 
But thanks Terry and 754 for the insight! I really should figure ebay out some day. . . 
Rachet~
No worries mate, but don't be frightened of EBay, there are always crooks trying to rip you off (at your dealer or on Craigslist too) but really, it's a wonderful resource, I've bought and sold over 600 items (mostly bought) and have had only one or two bad experiences.
I just bought some OEM BMW heated handle-grips for my BMW K1100LT for 80 bucks on EBay, they arrived last week in perfect condition, airmail was only 20 bucks, so I've saved a whopping 300 bucks off retail! Cheers, Terry.
