I'd never really thought much about Ebay fees, since most of the stuff I've sold on there has been relatively low value.
I've just shifted all the unsold tickets I had left, and here's an example of the transaction:
2x GA and 1x camping (BN) ticket - face value €179, so ~£150 or so depending on exchange rate.
Sold on EBay for £160 + P&P - reasonably happy with that.
Buyer pays £165.75 immediately via PayPal, who snaffle almost £6, then Ebay feels reduce the amount further, so by the time I've paid the postage, I've cleared £15 less than break even on the cost of the tickets.
And they say there are people who make a living out of buying & selling on Ebay? Not any more, I should imagine...