@lane-ends wrote:I guess what I am considering is that every parcel a buyer receives is obviously being charged (in their eyes) less than actual postage costs, along with the perception of cheaper postal component than other sellers, other than sellewrs who offer the free posty option their resultant higher item pricing (or at least pecetion of)
eg Flat $5 across the board where every "stamp" price is obviously above this. Marketing reason=value perception, Practical reason=allows for more transparent discounting for combining etc
I haven't done that as a seller, but I've bought from sellers who price postage that way - that makes it difficult for me to comment on it though, because as a seller I look at what they charge, and look at what I know the minimum costs to them would be, so don't get an impression of things the same way a casual buyer would.
I can say that sometimes I look at cheap postage and feel more reluctant to purchase, either because it's an item I'd like to be packaged really well and discounted postage can sometimes give the impression of corner-cutting. 
Other times I hesitate because the item price is also low (i.e. underpriced) and these days I'm not inclined to feel guilty about taking advantage of a newby who didn't realise how expensive selling on eBay / postage is (wouldn't apply to you, obviously), or contend with a "whoops, I made a mistake with the pricing" etc, but at the same time, if the item price is reasonable (that is, doesn't appear underpriced), I'd be less likely to get any of those impressions.
In saying that, it has long been a theory of mine that there is a maximum percentage of the total price that a separate postage charge can be before even exact P&H can seem over the top or make the purchase appear to not be good value, just impression-wise.
By which I mean no matter how you look at it, once you price an item you are giving it value - not everyone is going to agree with that value, but if you take something and value it (in buyer's eyes) at $50 with $10 post, it's going to be conveyed as a $50 item, not a $60 item, which in itself gives a certain type of impression (can work for or against you at times).
If the actual postage cost is $25 though, partly subsidised by item price, and you list it the other way (i.e. $35 + $25 P&H), suddenly it's a $35 item, and fewer people may be prepared to pay $25 P&H for a $35 item. (It's the idea that "I can get the item for $35, so maybe I can find it with lower or $0 postage).
None of that probably helps much, though - in the absence of input from sellers who do price postage that way, I'd probably experiment with it and see how it goes.
