Turning the Pagefile off is actually a bad idea, windows *really* needs it, and MS say that reads far outweigh writes to the pagefile, so having it on the SSD is not a problem.
If you want to keep the install on the SSD light, create the pagefile on your other drive, system managed too.
Disabling Defrag, Prefetch and things like that are also redundant, Win7 automatically disables these features for the drive if it is fast enough, and completely disabling them may actually be harming the performance of the mechanical drive.
Now, as others have pointed out, buying an SSD off ebay may not be the best thing, SSD's are very temperamental and it'd be easy for someone to get shut of a broken drive through ebay as they are harder to fault find.
Don't benchmark the drive too much, the load they generate is competely un-natural and will overload the internal garbage collection and NAND flash cell load balancing systems for a while.
Check to make sure TRIM is enabled:
Click Start, type in command in the search window (don't press return), right click the "Command Prompt" option and choose "open as administrator"
In the console that just popped up, type in the following:
fsutil behavior query disabledeletenotify
If the answer is "0" then TRIM is enabled.
Hope this helps.
