Doubts have been expressed by investment website The Motley Fool over the valuation of Purplebricks.

The online agent, which launched in April of last year, floated on Thursday with a valuation of more than £240m.

Shares started at 100p but slid on the first day of trading, and finished on Friday at 95.5p.

The Motley Fool says: “At first glance, Purplebricks looks like it has the potential to shake up the real estate market but the figures don’t seem to add up.

“Indeed, Purplebricks floated at a hefty valuation of £240m, which would imply that the group is racking up at least £11m per annum in sales.”

However, The Motley Fool says that with 4,300 properties for sale, that should net the business fees of just over £4.6m.

It goes on: “That being said, figures put together for a private fundraising by the company a year-and-a-half ago predicted a net profit of £17.6m in the year to 31 July 2015, and £24.9m profit the year after.

“The online estate agent was also promising 30,596 instructions during 2015 and 39,660 instructions for 2016.

“So, without any concrete figures, it’s difficult to place a value on Purplebricks’ shares.

“Purplebricks might be a revolutionary new idea and low-cost way of selling property, but as yet it’s not clear if the company’s business model is sustainable.”

Writer Rupert Hargreaves does not criticise Purplebricks backer Neil Woodford, but cautions: “Woodford may have access to information that’s not yet available to the wider market.

“With this being the case, investors need to ask if they know enough about Purplebricks themselves before making an investment decision.

“Unfortunately, as of yet there are no City forecasts for Purplebricks, and the company is yet to publish a set of results as a public company.

“The company will report its first official set of figures as a public company on January 27.

“So if you’re looking to invest it might be wise to wait for these numbers before taking a position.”

The “fundamentals”, which show revenue to April 30 this year at £3.39m, with a pre-tax loss of £5.44m, are in the screengrab below.

Separately, Bloomberg has reported that in the five months since April, Purplebricks’s sales “jumped to £5.7m”.

It adds: “Purplebricks has online competitors too, like eMoov and Tepilo, which have struggled to make headway. They all face the obstacle of who shows the prospective buyer around the house if the agent won’t do it.

“Sellers may not have time or want to take the personal risk of inviting strangers around their homes.”

However, Bloomberg concludes: “Concern remains [whether] buyers and sellers will try to cut their costs, especially as the vast quantity of house price data now available to the public online undermines the traditional role of agents in helping clients value their property…

“Low cost, online upstarts have disrupted a whole raft of traditional business models – just ask a London cabbie about Uber’s impact.

“Even if Purplebricks falls short of achieving that level of success, incumbent real estate agents need to be wary of the upstart on their doorstep.”

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