OK, now I remember.
You do want to find out what assets may exist. If you can't find any, some folks would say its a waste taking him to court.
Public Records can tell you a lot. There are books on the subject.
That site that Aimless posted also has UCC filings, if I'm not mistaken. If you financed your car there would be one for you. If he or his LLC just financed equipment, a stack of building materials or something else, you MAY find one for him or for his company. Ideally you may find something with real value that he has finally paid for.
A visit to the tax assessor's office may get you a look at the alphabetical index of property owners. Elsewhere in the county office will be the place where deeds, mortages, judgements, liens, leasehold interests (say he rented a warehouse for 5 years) and other interesting items get recorded.
The court clerks' offices have an index of people and companies who sued and have been sued. They can pull the file for you to sign out and read there in the office.
In the building inspection and permits office, you may be able to look up jobs he has taken out permits on, including any of his own projects. A homeowner retaining part of the price of the construction being done might have some money that you could get if you had a judgement.
Also some states have personal property tax assessments, and you MAY be able to find personal property (tangible & movable) that way
Don't forget motor vehicles, though your state may not allow you to get the records yourself (to prevent stalking).
You don't say how you paid the $3,000 but hopefully it was a check, which then will give you a bank account number leading to a branch account.
You may also find that he put it into his own account instead of the LLC's, or endorsed it over to somebody he owed instead.
Anyway, good luck with this. If the lawyer doesn't want the case, at least they can give you some good advice on the do-it-yourslef approach. Also, in some places the small claims courts have advisors for people like you to navigate.
However, a crafty lawyer may come up with ways to motivate the guy short of a lawsuit, and may be able to get the guy to cough up $ or information about future $ or other assets.