I'm looking to buy a non converted with pop top to take out a few times to get a feel what the best type of conversion will be for me, I have been looking on eBay, gumtree, pre loved and here 4 or 5 times a day

For best value is there a better time to buy one ? I want to use it as my car and also take camping next year so no real rush but want to make sure I get good value and a quality motor - am I looking on the best places or should I be looking somewhere else ?
Thanks for your time