Wanting to buy, then you need to read all the information first.
So you have found what you want, and its selling at a really great price, so what do you do??? BID??? NO! Read ALL of the info first. Check the p&p price, are you happy to pay that, do you really think it will cost that to post (including a small fee for the seller for time etc). Check if they have 'Buyer Protection', or 'Accept Returns'. The first rule (for me) is NEVER bid, put it in your watch list, and read it top to bottom. If you think the p&p is too much DONT bid, or ask seller to reduce, or combine p&p if you are looking at more than one item they are selling.
REMEMBER, once you bid, You PAY. If the p&p you pay is £5.00 and the price on the parcel is £1.86 and you think you paid too much, it's too late. YOU agreed to PAY that price.
Go back to your last shopping trip did you buy the first thing you saw or did you shop around? eBay is the same, shop around, find the deal you want and are happy with, then BID.
Just think BEFORE you CLICK!