I may soon be interested in borrowing a Bung Xchanger for reverse engineering. (Or if you want to donate, if you feel particularly inclined.) I can not offer monetary compensation at this point, but if you're actually using the Xchanger and need a replacement I can lend you a USB flasher. (Similar to the Bleepbloop flasher.)
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TSSBAY01
i only have a bung xpander ^_^. what do you need it for? maybe ask in #nesdev irc on efnet, someone there might have one.
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clovis CA
if i had one i could, i only have a bb programmer =P
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Barcelona city - Spain
Nitro I have one Bung Xchanger like this one: 
, send me an email to [email protected] to negotiate ;-)