Baby sprinkle: Is this too strange to "request" second-hand gifts?

JenChrisBabyH

For many reasons (I believe its eco-friendly, cheaper, supports local charities, and has an element of excitement in the hunt)- I buy almost everything second- hand- especially kid stuff.  That said, I know friends of mine are planning a informal baby sprinkle once my baby is born (I don't know the gender and I have 2 girls already, so I'm thinking they are holding out in case its a boy). 

Needless to say, is it strange that I'd ask if any gifts are given (in either case of gender) that they come from a second- hand store? I know many of my friends buy garage sale/second hand stuff for their own kids but I've never heard of doing this for a shower, but I think it would benefit me (someone's $25 budget would go further) plus all the other altruistic reasons.

Am I not thinking of something that would make this effort a fail?