I was searching on eBay for vintage footwear for my shoeless 60s Barbies (and shocked by the high prices) when I saw these Barbie Collector repro shoe packs (also super pricey now).
Barbie Shoes - Original And Petite Doll Shoe Pack | Lazada PH
Vintage Barbie Shoes. | eBay
Barbie and Midge Reproduction Vintage Shoes 12 Pairs G7917 2004 Mattel for sale online | eBay
Barbie Mules OT Heels Original Accessories Mattel 1960s | Etsy | Antigüedades, Zapatos de barbie, Barbie vintage
Vintage Barbie Shoes | scans from Miller's | Roberta Barbiedoll | Flickr