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England international Ollie Watkins scored 91 Premier League goals in 221 league appearances for Aston Villa before moving to Saudi Arabia club Al-Hilal in August.
He was a consistent scorer, never failing to reach double figures for Premier League goals during each of his six seasons with the club.
The respective statistics of Nicolas Jackson and Watkins from last season suggest Jackson is more involved in general play than the England forward, while also being involved in more chances.
If Jackson's current run of form continues, his fee may prove to be a bargain.
Former Villa and England defender Martin Keown told BBC Sport: "I've liked him all season. I think he's key to Villa's success.
"I think he's an upgrade on Ollie Watkins, I really do.
"Ollie was magnificent for them, but this guy is more of a predator [in and around the penalty area]. Pace will always trouble top defenders and he's got it in abundance.
"I think having worked with the manager before at Villarreal, he's sort of fast-tracking his quick development.
"He looks like a really good piece of business right now. The team suffered and you need a striker who can give you belief you can win games when suffering and this guy is a special talent.
"With a talent like that you can go a long way."