Should I tell this to my client

So my SEO contract ended.

I wanted to email my client (Now former client) that I'll be re-pointing the links I built (Mostly on third party sites) to my existing or for future clients. I've already got my last payment from them.

If you would like to keep them, please let me know and I can send you the total cost.

I want to charge them like $50 to $100 (Average market value) per link for the 300+ links that I've built.

Should I send them this? I like to clear these things now before…

Should I tell this to my client