The former owner didn't have the brains to realize that you can't have exterior doors with windows locked by single-cylinder deadbolts and push-button doorknobs down in C-class.

Judging by this post, their marketing is firing on all cylinders - I was right to be curious how I got on their list - so, that could mean a quick sale.

It's, at the most, $15 per single-cylinder deadbolt and $25 per keyed entry and double-cylinder deadbolt.I also install and drill out my own locks.

For an investor to knock any one of them, prevents them from firing on all cylinders.

For example we always swap lock cylinders, shampoo flooring, chemical clean drains, ozone/disinfect, patch the mount holes.  

785 Double Cylinder DeadboltKeyed on the inside and outside780 Single Cylinder DeadboltsKeyed on the outside with a latch on the insidePersonally I like double Cylinder but Keyed on the inside and outside.

The steel isn't *that* thick, but you need a high-test hole saw to install a lock in one if there isn't a hole already; a previous owner at my rental didn't understand this.On my rental, I used the interchangeable cylinder locks from Landlord Locks. 

I can also get cylinders for other locks keyed for Kwikset if need be.

You can also change lock cylinders with a special control key, which will reduce the cost of changing locks over the long haul. 

My locksmith has my key chart and I simply have him rekey the cylinders after each turnover.