4) Jackson Martinez
Appearances : 38
Goals : 28
Age : 28
Potential Cost : £24million
Summary : By far the cheapest option on this list, Martinez has really rocked the Portuguese league in recent seasons, with a combination of power and pace at the forefront of the Porto lineup. With 28 goals in only 38 games (A better rate than Lacazette), Martinez has been fantastic and has actually claimed his desire to join Arsenal one day. This, of course, has led to hundreds of reports claiming that we have already signed him and so his name has gone slightly stale in the Twitter community, as fans can hardly believe any rumour anymore. But once again, is he able to repeat his form in a new country? The Premier league has proved to be the most competitive league, so once again could be a risky investment.