It doesn’t appear that Lost Threads Co has an ebay store. They mostly sell on Whatnot and Poshmark.
Looking at what they sell on Poshmark, it’s your run of the mill bread and butter items. Nothing super high end, just mostly items in the $10-20 range.
Highest Priced Sold Items on Poshmark
Gehrig Also Has A YouTube Channel With Some Tips on Buying Vintage