What is "low ball"

I got this email regarding a pair of cables I'm selling. Not low ball but worse in my opinion. Looks like phishing:

Good Morning, Thanks for your response to my mail, I hope it is in good condition like it stated because I have taken a close look at the advert and am completely satisfied, . I'll want you to remove the advert from web and consider this item is sold to me, I'll be paying via Certified check and the check will deliver to you in next two days .So i want to be the best offer by adding $50 to your money and i hope you will keep this item for me Your Full Name: Contact Physical Address not p.o box: City and State with Zip Code: Cell phone number: amount: I will like you to know that you will not be responsible for shipping i will have my mover to come over as soon as you have the check,and i will get back to you once my secretary made the payment out to you.(Pls send your reply to (left his secretary's email) Thanks

Dicey? or am I over reacting to this one? Buyer has 0 feedback.

no, you're not overreacting.

I wouldn't ship the item until the check clears at least 30 days (in case it's a phoney ) this way you'll still have your item. Don't ship until you cash the check. Even a money order can be reversed if a person pays for it by check and not cash. Be careful. Have you got the all of the buyers info? I'm just sayin'..............

I don't see anything fishy at all. I'd give him all the personal information he wants to know and throw in my PayPal password just in case he might need that as he was ripping me off.
Just make sure your bank can process checks FROM NIGERIA!

I didn't engage him at all. Just too many oddities in a generic email. Offering $50 more and telling me to cancel the ad. Having his mover pick it up? Just seems like someone looking to cause trouble. Will his mover need my social?

In regards to low balling, if the buyer has a decent price but says B/O, I think it's fair to ask them to include shipping or to go for 5-10% less.

I've listed nice gear in the $4k range that sold in hours with a few $1500 offers in there. Wishful thinking, but I also think that some of these people are just looking for interaction. Maybe they don't get out much.