An agreement for the sale of a strata unit was not concluded until 1981 and its disposition accordingly did not occur in 1980. Moreover, even if the agreement had been concluded in 1980 "it would not have met the criteria of a statutory 'disposition' for too much remained yet to be accomplished before the ultimate or final transaction or event entitling the plaintiff to the proceeds would or could occur." [C.R.: 66.2(5)(b)]