Wallapop (free) - Their homepage had me cracking up. Wallapop is the first virtual flea market app that – just like the real thing – is a treasure trove of second hand and nearly new cars, bikes, vintage clothes, jewellery, furniture, household things, decoration, electronics and more kind of classifieds. Buying is easy and selling is free. Start buying and selling on Wallapop now! You can make more money by selling your old but cool stuff. Sell anything you want! Just take a picture and post it on Wallapop – and voila like magic it’s instantly available to buyers in your local area. What are you trying to sell. Make that extra cash today and give Wallapop some of your time and energy.