Verified answer

I would say that "B" gets his money back, and "A" keeps both jackets (unless both people agree on a price to sell the old jacket for).

There is no way a small claims suit would be successful in the States.

In a civil LAW case a plaintiff can (technically) only request money damages. However, it is often used colloquially to include a case in EQUITY in which a civil litigant may seek an equitable remedy including such things as modification or recission of a contract, specific enforcement of an agreement for unique property, or for an "injunction" to cause or prevent some action. An injunction may include seizing pirated copies, an order for a person to stay away from another person, etc. There is no provision for a civil defenant to be put in "prison", except perhaps if there is a violation of a court order (mentioned earlier), which amounts to criminal contempt of court.

For example, I could sue you for trespass and claim money for any damage you cause to my property as well as an injunction restricting you from returning. If you violate that injunction you could be charged with criminal trespass AND with contempt of court AND any additional damages. Sometimes criminal courts dabble in "damages" when they order a convict to make "resitution" to the victims.

Under old English law the writs of equity were heard in Chancellery, not court, presided over by the chancellor.