Investing in collectibles can bring you stock market-beating returns over the mid- to long-term - if you know what to buy.

You'll probably have read a huge range of opinions on the subject.

We believe there is no substitute for straightforward, sound advice, so we've asked our experts for their opinion.

Here's five for 2013:

Muhammad Ali autographs

One of the world's most recognisable names and faces? Check.

A man voted "Sportsman of the Century" by Sports illustrated and "Greatest Sportsperson of the Millennium" by the BBC? Check.

A man whose name will take on near mythical status in the decades to come? Check.

A man whose memorabilia is already soaring in value? (Two pairs of his fight worn gloves each sold for $385,848 in December, raising the boxing auction world record by 122.9%). Check.

Yet Muhammad Ali's autograph remains hugely undervalued at just �1,200 ($1,925), according to the PFC40 Autograph Index. Tiger Woods' autograph is currently valued at �1,750 ($2,790), suggesting Ali has considerable scope for growth.

See our Muhammad Ali stock

The Beatles 

·         George Harrison's leather jacket made $178,000 at Bonhams in December.

·         A rejected demo tape sold for �35,000 ($56,394) in November.

·         Photos signed by all four members were up 13.5% pa in value between 2000 and 2012.

As the last of these statistics shows, Beatles memorabilia doesn't require the heightened coverage brought by important anniversaries for items to rise in value.

Yet as we progress through the upcoming decade, several key 50th anniversaries will be taking place: March will bring 50 years since the release of their first album, Please Please Me. These events will only help to increase demand for the world's most collectible band, and are a great reason to beat the rush and buy now.

View our Beatles memorabilia

Contemporary art

A surging market.

Sotheby's and Christie's both hosted record breaking contemporary sales in November, as the sector continued to grow in 2012; from less than 4% of the art world's turnover in 2002 it accounts for 11% today, according to Artprice.

The big buyers are getting involved. 2012's Artnews 200 report revealed that 84% of the world's leading 200 buyers of art collect contemporary works.

We are delighted to offer you two rare pieces from Damien Hirst today.

Neil Armstrong autographs

  

Neil Armstrong leads the way in profit potential among space autographs: they don't come any more important than the first man on the Moon, whose name will be recounted for centuries to come.

His signature grew in value by 26.1% between 2011 and 2012, according to figures from the PFC40 Autograph Index. Simply a case of increased interest following his death in August? Not so fast!

We have seen Armstrong's signature increase in value by 24.3% pa since 2000 - a clear indication that demand for this most elusive of autographs (Armstrong stopped signing in 1994) is ever growing.

Baby boomers are driving the market. This wealthy demographic grew up with the space race and now, as they retire, are turning to the passions of their youth.

View our Neil Armstrong memorabilia

Jimi Hendrix collectibles

Hendrix memorabilia is in short supply, as you would expect from a man who was only with us for 27 years, and spent just four in the spotlight.

And this short supply is coupled with considerable demand for his memorabilia, as seen by the strong prices for the small number of pieces that do appear at auction: a Hendrix-worn "gypsy-style vest" doubled its estimate to sell for $30,000 in December, while a Fender Stratocaster he used at the Monterey Pop Festival in 1967 made �180,000 ($287,500) in November  - two sure signs that this is a sector on the move.

To discuss any of these opportunities please get in touch today: +44 (0)117 933 9500 or info@paulfrasercollectibles.com.