Best sander for recycled scaffolding planks

[Maceoid]

I'm building some raised beds from old scaffolding planks, but need to sand the worst of the cr*p off first and make them semi-presentable before staining etc. I've got 30 planks to do, all in pretty shoddy nick.

I'm going to buy a belt sander at the weekend and have a budget of about £100 - any recommendations or makes to avoid? Is Bosch worth the dosh etc?

Bloke in B&Q was trying to persuade me that their own MacAllister brand was fine, but I know that "you buy cheap, you buy twice".

Any help much appreciated.

 

[r896neo]

If your confident there are no nails in them, chip off any nasty render, mortar etc and buy a planer and some blades, Sanding them even with 60 grit will take a very long time, planing will be much quicker

 

[big-all]

ryobi 4 inch belt sander a bit above your budget but a fantastic machine

dont pay any more than 70p for belts

just on your budget at one off my favorate shops

http://www.powertoolsuk.co.uk/webcat/details.asp?ProductCode=EBS-1310V&ID=5204