In 1980 ish Mission made the 751 and sold it at a retail price of £250 the press and public loved it and for two years on a row it won the best speaker under £500 award in What hifi. Every mag rated it very highly even Hifi World (one of the most respected mags in the world at the time) reviews from the public show it to be a much loved speaker that does little if anything wrong.
In the mid 80s everyone wanted a floor standing speaker.
Sales of mission 751 lost ground fast with a final throw of the dice Mission upgraded the 751 (making it Rear ported, Stronger cabernet, Sweeter tweeter , Bigger bass cone)
The new speaker was called the 751 Freedom and sold for a unbelievable low price of £350 the press ignored it,they had given the 751 so many awards it was becoming boring and now floor standards had 90% of the market so the press had to review them (many good standmounts/bookself speakers got ignored around this time)
Coming back to the Mission 751 Freedom what we get is a outstanding small stand mounted speaker we get Sweet , Fast , Musical, True to life and the two hardest things for a stand mount of this size we get open and we get the correct bass umph.
IMO the Mission 751 freedom is one of the best speaker mission have ever made and one of the last speakers they made that was designed just to play music.
The 751 are 2 a penny (and still a great buy) the 751 Freedom is a lttle harder to find (but not so many people know about them and they are a fantastic buy)
Considering inflation considering that it was under priced in the first place and considering other speakers I have heard at various price points buying new today the mission 751 freedom would be in the £450 to £600 price bracket.
I got the Mission 751 Freedom in mint for £90.
Ps. I do not know the link but cyrus seem to have sold the very same speaker but with a cyrus badge ?
Please do not take any of this as fact review is made up of a small amount of press snipets and a very large amount of my own opinion.