I built work benches in my shed with 2x2 frame and MDF sheets quite simple, not dirt cheep but not silly money, used 8x4 sheets,ripped down the middle with saw used them for the worktop and then up the wall behind them bit like a splash back, then a shelf above with florescent lights fitted underneath as you will always want good light
BUT I never leave the cars,radios etc out there as people have said sheds not secure and house insurance can be funny about £1000 of rc car stuff going missing out of what they class as a GARDEN shed

I have cctv all around my property but even with this I never leave stuff out in the shed
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Dave
www.norfolkbuggyclub.moonfruit.com
kyosho optima,Bosscat,Boomerang,,RB5 Vega,RB7,,RC12 5.2, TLR22-4,MP9,HB807T
Flask of tea & a rollup
Anglia model centre & CT Models
http://www.oople.com/forums/showthread.php?t=28117