If you want offers, you may want to provide the following:
- Voicebank type; what specific pitches are recorded
- Sample (whether it's the frog song [kaeru no uta ga, kikoete kuru yo] or something else; preferably acapella and in the octaves the bank is capable of singing)
- Is it configured?
- What's the target language? Are there missing phonemes that's absolutely needed for Japanese (if the bank is intended for Japanese)? I would refer to the following resource:
http://utaforum.net/resources/what-to-look-for-in-a-japanese-reclist-and-what-to-avoid.170/
- What flaws/quirks are present in the recordings (if any): accent with vowels, aspiration, American R, L, or trill instead of proper aveolar tap, etc. noise present in silence/artifacts from any noise removal performed
- Is there anything you want in exchange or are you giving this bank out without any strings attached?