I bought a maplin lucky bag of pots - turned out to be an "unlucky" bag... ended up with over half the bag being these huge 10M1 log pots - too big to use a lot. and then i got a load of pcb mount 4k7 pots, which are good, but they fall apart if you turn them too far (poor stops). the values were really odd... i'd say just buy a selection of 100k, 1k, 500k pots etc. maplin are much more expensive than most places - i buy from rapid electronics (UK). they are cheaper, but as i have said in another post, beware of the cheaper toggle switches that melt!