A fully formed sequential group of blocks secp is for sale, where A...F are private keys, G...J are public keys part 1 (gx), and K...L are public keys part 2 (gy). 
Group of blocks are formed sequentially with odd 'A' at an interval of 1.
Total number of blocks: 50. Price: 10 BTC. 

I can also generate block of public keys (without private keys) based on any initial public key. Price: 0.05 BTC. 

For questions, send a private message!

Demo (part of the block):
pk: 4bb7b36f21ecb0d1f022e94a4cbc0447fc8d38ecc2bcfedfbb0074f3651641bb
gx: bfb810ded91b7b6b7b75d16d77bdaea9c058b2221581feaeb7b0e709cbc79ae3
gy: 6a07eb895682e6fdb724888516f6bf469d9159e5f1b76a33b404dd58ddbd3bd5

pk: b369c959cdee340a885c4c47ef198513537f28a32be2c3799e3b42c4f5fac1c1
gx: f2e25c0854a08991bf91dae028a38dbe4e35341ab8c037915f2bdd8529df8299
gy: 6a07eb895682e6fdb724888516f6bf469d9159e5f1b76a33b404dd58ddbd3bd5

pk: b4484c90de134f2e0fdd16b5b343fbb6be21a3f9ec8ba15c04d1e9996b1fff86
gx: bfb810ded91b7b6b7b75d16d77bdaea9c058b2221581feaeb7b0e709cbc79ae3
gy: 95f81476a97d190248db777ae90940b9626ea61a0e4895cc4bfb22a62242c05a

pk: 4c9636a63211cbf577a3b3b810e67aeb672fb4438365dcc221971bc7da3b7f80
gx: f2e25c0854a08991bf91dae028a38dbe4e35341ab8c037915f2bdd8529df8299
gy: 95f81476a97d190248db777ae90940b9626ea61a0e4895cc4bfb22a62242c05a

Single block design:
pk   gx   gy
------------------
A   G   K
B   G   L
C   H   K
D   H   L
E   J   K
F   J   L
------------------