How large of a deposit is safe?

[Rachan M.]

Good Morning lovely BP community,

I am putting a lowball offer on a house that needs a lot of work. My (very nice) realtor suggests including a deposit that is not too high, but looks serious enough..  Something ~$15,000.

Before I make that move, I'd love to get your input :-) Is this safe? Should I be considering any best practices?

Thanks so much!