Korg Poly800/EX800 Users

I've got a korg poly-800 MK1 in good condition that I'm about to sell, but 
was wondering if I should modify it first (add the backup battery, add 
knobs for resonance/cutoff/noise). I think I could do an alright job since 
these mods are relatively easy, but I was wondering if I would benefit 
monetarily from doing the mods before selling or if I should leave it in an 
as is condition, as otherwise I have my hands full with plenty of other 
projects. Plan to sell it on the eBayne and from doing a little research, 
it looks like it sometimes goes one way or the other, however I don't see 
many of these units that are sold in a modified condition. Has anyone 
bought one that was already modified?

Thanks,
Joshua

Pulse 8 / nKode / cacofone [aim:goodtimetribe]
http://www.goodtimetribe.com
--- "You're growing up. And rain sort-of remains on the branches of a tree 
that will someday rule the Earth and it's good that there's rain. It clears 
the month of your sorry rainbow expressions, and it clears the streets of 
the silent armies...so we can dance." ---- Jim Carroll