It would help if you explained the postage problems. It is simple enough, if ebay are suggesting postage cost ignore it, they are usually wrong, only you have details of weight and size.
As far as price increases the only one in recent times has been sub-title increased from £1 to £2. As this is a service that is easy not to use, the Title has a lot more room now than when I first used ebay.
Charging 10% on Postage has been in force so long it can hardly be classed as new.
