go to
https://www.bestservice.de/vienna_library_voucher.html
and buy 4 vouchers for a 300$ (additionally, as free bonus, you can to select one of impulse reverb Hall of fame, Lex300 is very sweet)
After you do it, you will receive a mail from bestservice with suggestion to let them know, if you will want to buy any VSL product. All you need is to write, what product are you want to buy and how many vouchers you want to use (yes, you can use any count of vouchers, but overall price must be more, than price of vouchers.) So, at first a bought standart version% I select a Stainway on bestservice, put it to cart, press a button VSL user discount check, to know, if there is any discounts, and to obtain a price, that I say to bestservice. After it Bestservice made a BestCoin Bonus (- 5,00 $), so, at all for a standard version I made additional payment of 29.11$ to 2 vouchers by PayPal to bestservice.
In previous message I wrote wrong prices - because I has additional 15$ of BestCoin bonus before buying of vouchers.
So, the right prices is 229.11 for standart and 335.53$ for full