Why is King eds instant ocean so much cheaper?

[gregzz4]

I realize this is off topic, but I'm putting this up for all to see anyway, and so I don't have to write it down somewhere

The big 3 were tested with Elos, the kits were confirmed against J&L's kits, and I've gone through so many kits that there's no concern about old ones
My kits and test procedures came into question once, so they were confirmed @ J&L, and against 2 other reefer's kits with their own water
All matched

From when I started my LR in a tub until the bucket I opened in Sept/12, I used 6 bags of IO and 1 bucket. All bought from J&L and no batch #s

From my log book

10.5
410
1300

10.5
480
1400

10.5
480
1350

My last 6 buckets have tested;

Batch 11297 Sept 4/12
J&L
11
450
1400

Batch 12243 Opened Nov 9/12
King Ed's
11.5
450
1400-1450

Batch 12243 Opened Jan 9/13
King Ed's
11.5
460
1400

Batch 12243 Opened Mar 16/13
King Ed's
10.5
410
1450

Batch 12353 Opened June 13/13
King Ed's
10.5
410
1450

Batch 12353 Opened Aug 23/13
King Ed's
11.5
440
1450