If you're after a thrifty option, your best bet is this Ppla Playsuit. It's a popular product, while not very costly. Another strong contender for your wardrobe is this Mavi Jeans Romper. While the price of this piece is competitive, it will certainly attract a lot of attention. You might also want to consider this Splendid Playsuit. 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 Playsuit. This item is bound to become a total wardrobe staple. Also take a look at this Elie Tahari Jumpsuit. It's an attractive option both price and quality-wise. And do check out this Tadashi Shoji Jumpsuit! It's a very popular item and good value for money.