There isn't too much to do with them, but some websites let you trade you bulk in for a box or store credit. There's a relatively common one that lets you trade 1400 bulk in for a box of the new set each release for a period. No energy and cards must be in good condition, you have to pay shipping. I personally haven't done it yet, but know some people that have. I plan on doing it next set since I'm coming back to the game from a break. Assuming a box is $100 that comes out to like .07 a card, so three times what you estimated? Just don't do the match on how much you spent on each card if you start buying.
(First post in like six months and I can't remember if we're allowed to post outside card websites or not. If you want the website PM me and I'll send you the link privately, or if someone else can confirm we're allowed to post I'll post it here unless that someone beats me to it. Since we are in between sets the deal is not live, but it should be once the next set is closer to coming out.)