If you're using Electronize controllers, that price you've mentioned of £39.75 sounds like the cost of one controller. With Electronize units you will need two controllers (one for each side of drive on your robot) so the chances are that your speed controller price will more likely be around £79.50, plus P&P. At that price it may be worth contemplating getting a dual speed controller (one controller but controls both drive motors) as the Scorpion XL and the Sabretooth 2x25 are both roughly £80 and offer more precise control.

£200 can seem quite a lot when your funds are small, but that is the average price of an entry level featherweight.

Just to make you aware, there is a transmitter/receiver combo that offers four channels of control for £27, making it a cheaper option than the £45 one you listed. Take a look at: http://www.giantcod.co.uk/gianitcod-24g ... 03779.html

And yeah as Gary said, be prepared to spend more than you possibly anticipated buying all the little bits and pieces. Bolts, LEDs, wire, connectors and so on really do add up when you're on a budget so keep an eye on that. In addition to the delivery costs, a lot of websites list their prices without VAT (and then the VAT-inclusive price in smaller text and/or brackets next to that) so that can add an unexpected few pounds onto the cost of items if you initially overlook that.