Consistently good prices on top line tubulars at merlincycles.com. The runner up is probikekit.com. Merlin had free shipping until covid. Top tires should not be above $60 delivered. No sense in using less than best. Current clinchers and tubeless are so good only best of breed tubulars are better. Glue your tires. Costs about a buck each.
In time you will find ways to feed your tubular habit for less than above.