I feel that, my last one was the same - I end up getting one or two polishes here and there to try not to just have 5 of them in a single order coming, and the individual $3 to all the sellers plus the consolidation ends up being a small fortune. I've been cutting it back until recently, last time I wanted some destash Illyrians so I went for it, sent some other Illyrians to make it up, added a couple of extras elsewhere, now I'm caught out with Illyrians arriving too late, so here we go again!
BF is probably worthwhile, at the moment I'm thinking Polished for Days, Different Dimension and Emily de Molly in addition to Illyrians, but they might end up being cheaper direct again. It's not like the old days! The dangerous goods stuff changed it from cheap to expensive, and the cutting back on buying made it worse. It's like denying yourself costs more than it used to giving in to temptation!