Syr. a/e but generally a/u in Jewish texts. In JBA pael often without a spelled final nun. In JBA prints peal often with thematic i vowel -- surely erroneously; in Nabataean the T stem is without dental-sibilant metathesis.

For the ultimate etymology of this uniquely Aramaic verb see discussion in AIOA pp. 112f.
Note that effectively it is very difficult to distinguish between Dt and Gt in unvocalized texts; perhaps it is better simply to render either as "to be subjected to a purchase transaction". Explicit examples of Gt, however, appear to be quite rare.