Small claims court?
I've personally done this sort of thing countless times, and can tell you from experience that a note jotted down on a paper napkin and signed by both of you in McDonalds will hold up in small claims court. In small claims the judge is looking for the spirit of the agreement. If you can show him some evidence that you had an agreement it goes a LONG way for your case.
Well hopefully the small claims courts in your state are better than ours in Missouri.
Sure he can take a napkin that you both signed into small claims court and win. But that is all small claims court does is make the decision, they can't & won't force him to pay.
You would just win a judgement and then it is still up to you and him to work out how you are going to get paid that judgement.
The benefit of having the contract signed by a notary is that you could sue him and take him to a court and not small claims court.
Here in missouri the limit is $3000, anything below that goes to small claims, anything above that goes to a associate circuit court.
Now I know everyone is going to say that the value of the computer is below $3k, which it is. But you wouldn't sue him for just the cost of the computer. You would have other fee's, such as lawyer fees, missed work,etc,etc.
I should have edited my post, it doesn't have to be signed by a notary if you go to small claims court. But until it happens you have no idea if you would take him to small claims or circuit court. it would suck to follow the latter and not have everything you need to win your case.
Collection
If you win in small claims court, the burden to collect is on you, not the court. Sometimes the defendant pays immediately, sometimes not. If the ten-day appeal period is over and the party that has lost the case has not paid, he or she becomes your "judgment debtor."
If the defendant does not pay after a personal contact from you, you have the option of obtaining a court order for the attachment (seizure) of the defendant's assets and garnishment (paycheck deduction) of his/her wages. You must provide the sheriff with the information necessary to locate the debtor's personal property or funds. For the seizure of motor vehicles and home appliances, you will probably be asked to describe the property, identify its location and provide a registration or license number. To seize bank accounts or income, you will need to tell the sheriff where the debtor banks or works.
The sheriff will charge a fee for collection services. This amount is recoverable from the debtor ? if you succeed in collection.
Another option you have is to engage a collection agency or attorney to collect for you. This is expensive. The agency or attorney will commonly take one-third to one-half of what they collect plus expenses. They may also charge you a fee even if they are unable to collect anything.