Have only used "box-em-up" store once, for a huge glass/framed original
art print.
Always use my super new/friendly local Post Office ... or another location
that does UPS/FedEx for large boxes (fabrics/quilts).
Needless to say, ALL shipping has gone up and we just have to bear with it
if we sew to sell, use EBay, Etsy, etc. Amazon for books.
Guess mailing several hundred packages a year tells me there is no way
around this.