My answers
1) Is it an acceptable practice to handle your gold and silver with bare hands? i.e. can this effect the resale value of coins?
If it is a bullion coin or bar then you can, it makes no difference to the end price especially if you sell them to a bullion dealer. If it is a coin that has collectors value then don't as the oils from your skin will change even the colour of gold. If you don't know if it is bullion or collectors then don't handle it.
2) Is the condition of coins important when you want to sell them?
Not if they are bullion and you are selling them to a bullion dealer, if they have collectors value or bullion coins that you are trying to sell to some numpty on eBay then yes.
3) Why do Britannias cost about £45 per coin more than a 1 Troy oz bar or a Krugerrand? Especially given coins seem to fluctuate less than the equivillent weight in a bar. Does this have anything to do with capital gains tax?
No, this is all to do with the profit that the Royal Mint is orignally trying to make on the coin, they release the coins in limited numbers to give them an initial collectors value, the same with later proof version of Krugerrands, Maples, Nuggets, Eagles, etc
4) WTF are netto & brutto prices?
With or without tax - normally quoted in this country by some pompous **** who would try to use Latin in normal conversation
5) Can anyone detail the percentage range that dealers take against a PM sale, does this vary between silver and gold?
There are few bullion dealers in this country due to the way PM's are perceived, post WWII laws (repealed) and current tax law, so you don't get all the dealers offering a similar deal as you do in the US. In the UK for individual gold bullion coins & bar a dealer will give you spot -1% to -10% and sell at spot +5% to +15%, you get more for bulk.
In general you will get the same spread for silver bullion but the purchase price will be more as they have to add VAT
If it is a collectors coin then the price really depends on if the buyer is looking for that coin or knows a collector who would want to purchase
6) Why do we have to pay VAT on silver?
Because Brown is a numpty