If you're in a thrifty mode, your best bet is this Dsquared2 Jumpsuit. It's a great piece, while not very expensive. Another strong contender for your wardrobe is this Puma Select Jumpsuit. While the price of this piece is rather reasonable, it will definitely attract a lot of attention. You might also want to consider this Freddy Jumpsuit. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you can afford to spend a little more, we've got your back with this Au Jour Le Jour Romper. This item is bound to become a total wardrobe staple. It's also worth taking a look at this See by Chloe Playsuit. This piece is ultra popular and, just as importantly, not very expensive. And do check out this Diesel Jumpsuit! It's a very popular item and good value for money.