ὀβολοστάτης
ἐπ' αὐτὸν ἥκεις τὸν βατῆρα τῆς θύρας → you've come to the crux of the matter, come to the point, hit the nail on the head, you've come to the very threshold of the door, you are come to the very threshold of the door, you've arrived at the truth of the matter
English (LSJ)
[ᾰ], ου, ὁ, (ἵστημι)
A weigher of obols, i. e. petty usurer, Ar.Nu.1155, Hyp.Fr.154, Antiph.168, Philostr.VA8.7, Onos.1.20 ; but ἐκ τῶν πλουσίων τριάκοντα ᾑρέθησαν ὀ., ὅ ἐστι δανεισταὶ ἐπὶ ὀβολῷ τὴν μνᾶν δανείζοντες Sch.Aeschin.1.39 : perh. from στῆσαι, = δανεῖσαι ; cf. στάσιμος and Hsch. s. vv. ὀβολοστάτης, ἱστάνειν :—fem. ὀβολο-στάτις, Pl. Ax.367b, Poll.3.112 : hence ὀβολο-στᾰτική (sc. τέχνη), ἡ, the trade of a petty usurer, and generally, usury, Arist.Pol.1258b2.
German (Pape)
[Seite 289] ὁ, der Obolen wägt, ein kleinlicher schmutziger Wucherer; Ar. Nubb. 1139; Antiphan. bei Ath. III, 108 c; Plat. Ax. 367 b, mit der v. l. ὀβολοστάτις. Vgl. Poll. 3, 85.