Luftwaffe and Allied Air Forces Discussion Forum

Hi all,
I don't know if this has already been asked, the search at isn't working for me. I'm inquiring about Eric Mombeeks series 'Jagdwaffe' and the various colors and markings of the aircraft through the Second World War.
However, they don't seem to be available at all. I presume they've gone out of print. I've searched everywhere for them, and the ones I've found are $200 and upward.
The one I really wanted a few months ago, 'War over the Desert 1941-1943' was around that price on eBay, except for one copy at $100. I bid and won, but the item was withdrawn in the last hour of auction. When I contacted the seller he claimed he'd sold it on another site, which I highly doubt.
Not just the desert warfare but most others in the series are thus priced. Any information the the one book I have is out of date and the publisher has 'no results found'.
Any idea where I can find copies (Desert and BoB ones would be nice), or what the deal is?
Thanks.
Regards,
Sean