Millwall have been on an upward motion since their play-off final defeat to Barnsley two-and-a-half years ago.

The following season the Lions bounced back to the second-tier and lasy year, they made a surge toward the Premier League finishing eighth in the Championship.

Having narrowly missed out on a play-off place last term, Neil Harris' men started this season in unbeaten fashion before three consecutive defeats.

Despite that, the nucleus of the side that won promotion at Wembley against Bradford is still intact, with a few additions here and there and a couple of departures, too.

With that in mind, the Lions' player's valuations must have risen during their time riding the crest of a wave.

Harris has done a remarkable job since being appointed three years ago, and that show with the club’s record transfer received being smashed after the sale of George Saville to Middlesbrough at the end of last month.

The free is reported to be £8million for a player who arrived for less than £500,000 the year before.

With that said, we here at FLW rank the three most valuable Millwall players, in order.

Have a look and see if you agree with our valuations.

The Millwall defender was subject of intense interest from Rangers in the summer and had several bids for his services rejected by the club; the highest reported to be £5million.

Considering Cooper’s age, 23, and current ability, thrown in with his potential, you are looking at around £9million.

He is a rock-solid centre-half who is competent on the ball and can make a tackle when needed - the perfect modern-day defender.

Defenders usually improve the most as their careers go on and being 23 and a top talent aready, there is still so much more to come from the young man.

The tricky winger had a deadline day bid rejected from Middlesbrough in the region of £5million. 

Considering he is still only 24-years-old and is a talent on the wing - when on form and up for it - he is probably worth around £6million, throwing in potential to.

With his peak not being too far away, it is a fair price.

Millwall signed the winger from Wolves for a fraction of what he is potentiallyworth, and with form a temperamental thing for a wide man, they tend to be hit and miss regarding valuation.

Wallace is a crucial player for the Lions, and his value is probably around the figure mentioned above.

Goalscoring midfielders are hard to come by, and Aiden O’Brien is precisely that.

The 24-year-old manages to score more goals from wide positions than he does when he plays up front, as he is also able to be deployed as a striker.

He has skill in abundance and can carry a team forward.

His fitness has a small question mark over it as he rarely finishes games, but having just become a full international for the Republic of Ireland - scoring his first goal for his nation on his debut - that is sure to bump of the value.

Around the £4million mark for a young attacker who can fill in several different positions and who is now an international to boot.