Gritting much

OK I have a venicci 3 in one travel system it was a limited edition, and isn't sold anymore, I paid just over £400 and now I'm due baby no2 soon (3months) my little one isn't old enough to walk alone yet and I already have the double pram I want in mind, but I need to sell this pram for the money to go towards the pram I want, I've posted everywhere at a price of £120 I think that is relatively cheap compared to other prices people sell there second hand prams at, I don't know what else to do to sell it, anyone else able to help me sell my pram so the money can go towards me buying a new double pram for my babies. I'd sell it on here if I could but I don't know if it would be allowed