Glad your happy with them Mick.
The coins you bought and sent were for your own reasons and came back at the grades / varieties and problem free.
Getting another opinion rather than just putting them away will not do any harm.
The actual value is IMO not as important as you probably wont be selling it and adding to your collection / interest in the year.Some prices though for certain pennies are cheap and i would be happy buying them already slabbed and pay full price as i am keeping a constant check on prices through auctions,dealers lists etc.One penny i would if the coins appeared right buy a hundred cgs of one year in UNC today .Obviously some will be expensive and this is all relevant to buy the coin not the slab /price (which is what your doing right) or weather the coin is worth even sending although £15 is not much to pay.You will see even more so now everybody does not have access to there website coins being sold alot more than the cgs price a recent example being a penny cgs price was £375 less than it sold for in auction and was attributed correctly.
The prices are also updated as more come available the price may well come down alternatively if auction prices increase or coins are hard to find they may well go up.
All good fun
Your buying nice coins and Hat Off to you.
Lastly the 1888 penny you bought i doubt cost you so much
Pete.