Best time to sell my house

[belfield]

I am thinking of selling my house and buying one with a friend, is now a good time to sell, or should you wait untill house prices pick up again. not sure what to do only bought my house last year when prices were actually a lot better than now. Does it actually make any difference because although i will get less for my house surely i will pay less for my next one. And if i wait a few months maybe my house will be worth even less, any advice anyone please.