So, food for thought:
You are wide fucking exposed on your feedback. You may get 299 bad feedbacks from digruntled losers.. If you do sell 300, I'd be willing to bet you get at least 25 shitty feedbacks out of this.
We know you, so we can somewhat trust that you will be honest. Noone on ebay knows you. This is a problem. You should think about hiring a mutually trusted 3rd party for the number drawing. Random.com is a good idea, but noone can be secure in the idea that you could just rig it. If I didn't know you, I would laugh and move right the hell on.
I wonder if there is a mutually trustable 3rd party out there on the web somewhere who would be willing to do this for you.... Maybe for a fee.
And pissedoffsol won't work, we trust him, but again, noone on ebay knows him.
AND NOW THE KILLER..
This is taken straight out of Rhode Island Law:
Section 11-19-1 "every person not authorized who shall, directly or indirectly, set up, put forth, carry on, promote or draw, publicly or privately, any lottery, chance, game or device of any nature or kind whatsoever, by whatsoever name the same may be called, for the purpose of exposing, setting for sale or disposing of any money, houses, lands, merchandise or articles of value, or shall sell or expose to sale lottery policies, purporting to be governed by the drawing of any public or private lottery, shall sign or endorse any book, document or paper whatsoever, for the purpose of enabling others to sell or expose to sale, lottery policies, shall be deemed guilty of a felony and shall be imprisoned not exceeding two (2) years or be fined not exceeding two thousand dollars ($2,000)."
cLiCkY for complete law.
Congratz! you are now a felon.
You really should look into these things a little better.