It is not unreasonable to ask for suggestions of standard materials & material suppliers that are included in their budget.  

There is actually good fun to be had with unwelcome callers; If it's one particular wholesaler, pick an unreasonably high "make me move" price.

but I don't really want to risk going through a tough escrow with a novice buyer trying to shave me down with contingencies and unreasonable demands related to inspections... especially in a softening buyer's market. 

People suck, they are dumb, they are stupid, lazy, egotistic unreasonable, Stobborn, stink and... they are extremyly friggin DUMB!

Expecting an A class tenant in a crappy apartment would be unreasonable.

I also had tenants call the fire department for a supply line leak once in the middle of the night.I think my tolerance level for unreasonableness gets lower every passing year.

It wouldn't be enough for an Option to buy even.To prevent the 'not enough/unreasonable consideration' argument coming back (from an heir or someone) later, I would make it at least a few grand if you can swing it.  

Are we being unreasonable and heartless?

I did have some problems with communication, but nothing unreasonable like what @Albert L. has been experiencing.

It's not unreasonable to think these will head that direction over a long enough investment timeline.