SALESBOOST VS COMPETITOR PRICING

Not sure what is a fair rate for contact data? 
Below is a table of a client example! Seven quotes, taken from each vendor's own site for — single-family construction, SIC 1521 / 1522.

VendorContactsPrice/Contact ModelNote
SalesBoostYours to keep 357,000 50¢ Yours to keep+ 8 contactable fields
LeadsPleaseOwn / one-time 275,000 42¢ Own / one-timeDirect mail; email is an add-on
SICCODE.comOwn / one-time 240,000 25¢ Own / one-time90,000 companies carry an email
Exact DataOwn / one-time 39,000 50¢ Own / one-timePhone-verified, NCOA
Apollo.ioRent / year 28,000 2¢ Rent / yearVerified; export caps on low tiers
BookYourDataOwn / one-time 42,000 20¢ Own / one-timeSIC 1521 + 1522, work email
Hunter.ioRent / year 4,000 2¢ Rent / yearVerified; best for pattern inference
Snov.ioRent / year 3,000 3¢ Rent / yearVerified; unlimited export