i get julio, i give up sproles demaryius thomas, and RGIII
my team 10 team standard
QB Philip Rivers, SD RB Chris Johnson, Ten RB Jamaal Charles, KC WR Andre Johnson, Hou WR Marques Colston, NO TE Jimmy Graham, NO FLEX DeAngelo Williams, Car D/ST Jets D/ST K Mason Crosby, GB Bench Darren Sproles, NO Bench Percy Harvin, Min Bench Demaryius Thomas, Den Bench Peyton Hillis, KC Bench Robert Griffin III, Wsh Bench Reggie Wayne, Ind Bench Justin Blackmon, Jac
Thanks for your comment on my page. Also looking at your team I would probably make this trade. You are only trading bench players and you are getting someone to fit into your flex spot. You also still have Percy Harvin on your bench, deAngelo would move down there too, and Reggie Wayne and Blackmon can easily have a great season too. (Even though I am not a fan of RGIII because he is much smaller than Cam and the craze Cam brought has made RGIII a little too attractive) I would try to hold onto him that way you have a decent back-up that has the potential to blow up or another thing you could do is try to throw DeAngelo into the trade instead of Sproles. I just think the other guy can throw a little more into the trade or you could try to save either RGIII or Sproles as a solid bench player. You also had a great draft and if you don't make the trade your team looks great as is.
QB- P. Manning RB- LeSean McCoy, Ryan Mathews WR- Wes Welker, Larry Fitzgerald TE- Kyle Rudolph W/R- Run DMC B- Donald Brown (RB), Anquan Boldin (RB), Aaron Hernandez, Jason Witten, Josh Gordon, Vick Ballard K- G. Zurline Def- NYG
Usually any sort of 2-for-1 or 3-for-1 where you're getting the best player is a great deal.
Make the trade. Julio is a big upgrade at WR and you'll still have nice depth without the players you're trading. Your RB3/4 gets a little weak but in a 10 team league, you can probably find some nice upside picks on the waiver wire to make up for it.
You might try countering with A. Johnson + RGIII for Julio. In NO they seem to find a way to get Sproles the ball. It may just be that he's really valuable in my league, but I'd be looking to keep him if you can. My counter still gives you an upgrade in who you start, but you keep a little depth too.
In making any counters, don't burn the bridge of the initial offer. I'd go for it too. Getting the best player back in the deal without giving up a starter is a good deal. RGIII is the real wild card here. His trade value could be as high as it will be all year, or you could be moving a valuable commodity.