Selling condo. Tenant requesting compensation.

[Brian Britton]

I'm selling a condo that I rent out.  Renter is requesting $200/month rent credit, $75 per open house and $50 per showing. Condo is in Seattle, WA and nothing in the lease prevents me from selling the unit except that the new owner needs to honor the current lease. It seems ridiculous what the renter is asking.   What is customary in this situation and how would you handle this?  Thanks.