1999 Trinidad Brilliant Uncirculated Set - Rarity?

[VickySilver]

I just got this set for laughably low money but suspect it is quite rare with catalogue values based on NOTHING. These coins were struck by the Royal Mint in sizes from one cent through one dollar and very prooflike. Mintage not recorded, and I’ve not seen another. 
this is one of those sets/coins that are largely forgotten and never really noted at time of release or since then. 
Currency versions were struck from one cent through 25 cents but no 50c or dollar coins that I can tell - so the only “uncirculated” of any type in the BU sets. 
1999 Trinidad Proof Sets were struck with an authorised Mintage of 3,000 but I suspect many fewer made it to collector channels. 
 

BU Set:

 

[Mr T]

Awesome find!