I collect these codes just for Listia. I don't know what the point value is for them because I have never & probably will never get a rewards account. However, prior to trading these codes, I watched many auctions for about 2 weeks. The least they ended at was 399 (for 1 wipes code). The most was 2300 (for 1 diaper code). So I list them at 399. I figure whether they are wipes or diapers it really doesn't matter because I list them for the lowest possible credits. In the end it's your decision if you want to bid or not.
You don't have to enter they points to know what you're selling. Pampers website has a chart that will tell you what they're worth. So you need to know is what kind, size & quantity box you bought. You didn't even list if it was diapers or wipes. I would gladly bid on your auctions if I knew what I was bidding on.
I buy them off people. I don't have kids. Like I said, I just collect them. I never bother to ask where they're from because most people who don't use them don't remember & they'll end up mixed up in my wallet anyway. So again, it's your choice if you want to bid or not. I always get at least 399 & that's all I want.