Ended up negotiating back down about $25k after inspection anyway lol.

Terms, down payment, price, amortization is all up for negotiation.

What does he do for a living, a position of power or negotiator?

With retail you have mom and pop, regional, and national tenants.Often mom and pop tenants can't afford attorney representation so try to do things on their own to negotiate a lease.Owners could try to write anything into a lease but doesn't not mean it is legal or enforceable.

How did you find this deal and how did you negotiate it?

Able to negotiate down a new TH for $400K (actual price $456K with all upgrades). 

My partner and I are in negotiation for a 6-unit property in NE Ohio, below are details: 4 rented, 2 vacant / average rent $735 (4 rented units $720, 2 vacant $775)Owner pays water, sewer, trash2 br, 1.5 bath, roughly 900 sfGarage with door + extra parking areaRoof in good shape, air and furnace in good shapeRealistic gross all units filled: monthly $4,400 / yearly $53,000We walked through both vacant units, very clean and basic.

How did you find this deal and how did you negotiate it?

Also as you may already know “some not cutting the grass” CODE violations increase by $100 a day (true they can be negotiated), but why not know about it?

Then you can negotiate a 3% commission, which gets split with your broker, so you'd get the 1.5% difference back at the end.