Let's say, hypothetically, that you registered some typo domains of established (mainstream) websites.
Let's say that those domains together bring in about 2-4k uniques per month.
Let's say that you have felt bad about it all along, and therefore never capitolized off of the traffic in anyway, shape, or form (say you just have them going to a blank page in order to gather stats)... and you'd really just like to get rid of them at this point.
Would you contact the owners of the established sites and give 'em to them ... or try to sell them since you are already a bastard for reg'n them in the first place?
Or just let them expire and forget about it?
Again this is ALL HYPOTHETICAL.
-P