Last year, I switched to a 1x9 setup on my XC bike, and this year upon learning a bit more about my riding style, I decided to put the granny gear back on 
The conversion was done the same year my son was born, plus I got another bike late last year which I've been riding primarily since, which means as far as ride time these components have mayyyyybe 150 miles on them.
If you buy everything, you have all you need for a 1x9 conversion, but I'm ok with selling individual stuff. I haven't got pictures yet but will gladly take upon request. You can either pick them up at my work (car dealership in Bethlehem) or my house in Macungie.
Condition: Rear derailleur and guide ring are in great cosmetic and working condition. The MRP 1x has a scuff on it from when I was setting it up and I dropped the chain. Works absolutely perfectly though, never dropped a chain after I got it set up.
SRAM x.9 9-speed short cage rear derailleur (2009 model): asking $40
e.Thirteen 32 tooth guide ring (2009-10 model), looks pretty much like these but normal metal color, BMX-style bolts are included, asking $15:
http://www.e13components.com/product_guiderings.html
MRP 1x Chain Guide, white, bottom-bracket mount, asking $15:
http://www.mrpbike.com/product.php?section=product&item=1x
PM or call 610-six-five-three-6189, thanks!