I picked up this lighted (3 different settings) 30X magnifying lens off of Amazon this week for $8 and change, and it's a beast!! There was an identical one for fifty cents cheaper, but it didn't have a wipe cloth and carry pouch, so I dropped the extra four bits to live in high style...
maglens.jpg
Of course, as I was checking on the status of my order the next day, (as what regularly happens there) I saw the price on the site had increased to almost $20. Got it just in time, I guess. LOL.
ETA: The pictures were taken by me.