How do I figure out what the lot is worth?

[T M.]

Hi guys and thanks in advance!!

I managed to find a nice sized vacant lot while D4D and looked it up on assessors site. It's got a land (value, I guess) of $104,400 and a total net taxable value of $104,400. There were all zeros in the column for "improvements", "fixtures", "household personal property" and "business personal property". 

I'm brand new to wholesaling and am enrolled in RE courses but I don't have a clue how to transition from wholesaling houses to wholesaling lots, let alone, commercial lots. In particular, I'm thrown off because there is no structure on the lot to be renovated when dealing with wholesaling lots. Also, this vacant lot is not listed anywhere that I have seen.

a. How do I figure out how much I should offer the owner? (I'll be going to the assessors office tomorrow to look up owner's info so I can make an offer)

b. How do I figure out how to pitch this commercial blank canvas to a buyer?

c. Since its zoned as "vacant commercial land", are there different protocols getting it under contract and for working with buyer and title company? Is process the same as for residential?

Any info is much appreciated! Thanks all! 

TM