I’ve sold the bed I had but still have sheets to fit that I could sell.

R.

Depending on what you're looking for, have you considered looking at IKEA? You can probably get a bed plus mattrass for 100-150 CHF there. 

I guess that you are looking for a cheap bed to get you by for the next year or two.. if so, then keep searching the classifieds here and on other forums, or as Edward mentioned, try Ikea - you can get them to deliver if necessary. However, you will pay more than what Edward has quoted.

However, If you are looking to buy something substantial and long term then give me a shout, as we sell handmade british beds in Switzerland

It's very hard to sell large items like beds mainly because people don't have the transportation.  You should be able to get quite a bargain.

Moving a mattress of that size is likely difficult if not impossible by car, even in an estate sized car.  (Usually the bed can be dis-mantled).  

There are loads of small one man firms with a van who will dismantle, transport and re-assemble a bed and mattress if you buy one second hand.

Ikea also charge for transportation and assembly so you can simply compare the second-hand price with the cost of something from Ikea or Interio.