The E3110's will also do 4.5ghz on air if you have a decent enough cooler. Mines pretty stable at that speed but the chip starts to push for 90c.
Test your, see what overclock you can get out of it and then you'll be abe to figure out a price. Also check the Stepping, you want E0.
Thanks to BradleyKZN for polishing my sig
“oooooooooooh fire!!! and girls...GIRLS and fire!!!!!!! oooooooooooooh *runz around clapping hands together*” -Marineborn