Where can i find a really pretty prom dress that is short in the front and long in the back?

try going to this site which sells for a VERY VERY AFFORDABLE prices. some are lower than $3!!!
it gives you a variety of choices. 
enjoy!
http://www.wholesale-dress.net/women-s-dresses-c2102

Not sure what kind of dresses your into, but I found this really unique dress from Ever Fashion Cosplay, they are my favorite place to shop for dresses.

http://everfashioncosplay.ecrater.com/p/8782356/yellow-floral-painted-look-beaded-a



Some others:

http://everfashioncosplay.ecrater.com/p/8782134/royal-purple-blue-a-line-one

http://everfashioncosplay.ecrater.com/p/8782156/white-floral-print-watercolor-a-line

http://everfashioncosplay.ecrater.com/p/8424381/sheath-column-v-neck-halter-floor

They'll also take requests if you drop them an email. ;)

There are many evening dresses online, you can just visit a website and choose one you like if there is any. http://www.shoppinglucky.com will be a good choice

Prom Girl has a really stunning dress that is short in the front ands has layers and ruffles longer in the back.  This dress is an absolute beauty, and will put all eyes on you !  This sells for $298.00!
specifics:
Looking for chic, fun, and flirty? This fabulous short strapless dress for prom is all that and more. A stunning cocktail or holiday dress featuring a ruched strapless bodice and a short skirt with layers of long ruffles cascading down the back. A strapless short dress that all your friends will want to borrow.

There is also a beautiful Halter satin dress that sells for $99.00!  This comes in dusty rose, black, gold or orange!
specifics:

Halter satin and asymmetric dress with front wrap and detachable brooch accent.

• Halter neckline brings attention to the bust
• Back zipper closure
• Cascading ruffles adorn the skirt
• Matching Scarf Included
• 100% Poly Satin
• Made in USA

I will add some more options to look over, I am sure you will find something just perfect!

Camille La Vie has amazing prom dresses - but TJMaxx, Gabriel Brothers, and your local thrift store are the best places to get a great value and look beautiful at once.  Hope you look beautiful! Cajun Grille 2138806772 store url: http://www.camillelavie.com Store Text Info store info template goes here

Camille La Vie 2137029895