Awwww, the old two for one RB trick. WR are easy to come by. But, in Fantasy Leagues that are competitive, RB are key.
For you to give up 2 RB for 1 would be a harmful thing for you to do.
Remember, the key to a successful trade is that it is fair. This trade is lopsided.
Holt is a good WR. But, he doesnt put up the numbers every week.
I would keep my two starting RB's and wait for a better offer.