Depends on your marketing venues.

If you're using Amazon, skip the UPC as Amazon has their own coding system.

Buying a UPC from a reseller is tricky. If the reseller goes out of business or sells the same UPC multiple times (happens more than you think), then you'll have challenges.

Last time I purchase UPC codes, seems like it was $100 per 128 or 256 UPCs.

Whatever the cost, better to purchase UPCs from GS1, rather than a reseller.