I use Gruum shaving products which are very good imo. I take your point about price but they are more expensive and in my view better quality than Harry’s; and as they have no middle man (e.g. Boots/Superdrug) this is where the significant cost saving comes from.
Having said that, its quite easy to anticipate you will use more than you actually do than with these subscriptions, so I have quite a lot of spare razor blades as a result! 