I think it would be hard to find real reputable vendors selling stuff for venmo.  As far as I know it is really only meant as a friend to friend mobile payment system, not really for businesses. I've heard stories of people having hard time with streams of cash running through their accounts, but just stories from forums, so who really knows. 

I'd be able to sell you 2.5 btc now, should have a few more in a couple days but I wouldn't want to sell you them all right away.  I have not used localbitcoins yet.  I have usually just sold for cash in person but I can take a look