Odd proposals

Assalaamu Alaikum wa Rahmatullahi wa Barakatuhu,

Today i'll be ranting a bit. I've been gettin some odd proposals from guys who're already married and have kids, and when i ask them why they're considering taking a second wife, none of them seems to give me a straight answer, instead they just change the topic and or walk off.

I know i'm 30 and divorced. But does that mean i qualify only to be a second wife. Those that are single won't even consider me. I'm really upset...
Am i being unrealistic?

Have any of you been thru the same? And
On what conditions would you agree to be a second wife?