You've said 1/10th scale, so that's a start, you want something RTR, which 'should' come with everything needed.
An example would be the FTX Vantage, which is not a bad starter brushless buggy, with scope to upgrade and FTX are well supported with many online and local hobby shops able to get spares. Literally the only thing needed with this example is 4x AA batteries for the Tx.
http://www.modelsport.co.uk/ftx-vantage-1-10-4wd-brushless-buggy-rtr-waterproof/rc-car-products/40388
A little bit over your budget of