from my side : CD-r!! really cool diy format!!
you have no really obligation to make it as a limited version
ex: you can begin to burn 50ex, find few shop, underground distributor and see with us if they are interested to sell it
with no doubt if you send clear request & description you'll find few shop without problem, and after that when the first 50ex are place, you can re-edit it when you find new shop/distributor who'll be interet to sell it, etc…
(you can begin to contact them when you got the complete tracklist & preview, it's a good way to see approximativly how many you could press it, you have no obligation to contact us only after all the work is done)
btw you'll find more independant mailorder than real shop I think, mailorder are more interested by trade, so if you want complete your personnal discography its a good way to have independant & interestings cd/cd-r from all the globe & make contact :)) but you'll not have money from the cd-r that you exchange.
only you can know what is important for you…
what'll be the format??? jewelcase or stuff as that, or cd-r in a type of plastic. the second is really low cost and could give the possibility to do funny limited diy series
anyway if you need few shop contact, i could send you few , let me know
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take care
evy