Affiliate Marketing Secrets

I have tried £00.1, £00.9 & Buy it now.
I have sold 12 items so far and they are getting good final bids – Which have been paid for & I posted.
Although pleased with the results (I only sell good quality items) I do not know which method to use.
Sold dartboards, musical instruments etc in the range £20-30 range (better than I would get at a car boot – I reckon a fiver)
I have find my niche (electronics) – second hand but good stuff.
Just posting more items now but do not know whether to put reserves, high bids, international postage.
Also, I read ebay blogs saying that it is good to start everything at 1p and watch the bids climb up.
However, the stuff I sold for good prices I put a minimum (£10 & £20) and got bidding higher. But today I had to post stuff (bags) for 1p & .99p – so I am confused about using reserves, buy it now or not.
I have already concluded that if something is worth anything it will get high bids – However that does not tell me whether I should entice more bidders with low starting bid or just cater to serious buyers/those who really want the item.
Any advice/suggestions are much appreciated.
Thanks in advance.