Finnair Plus has points sales several times per year and currently has a 100% bonus for buying through June 19, 2020.
The sweet spot on Finnair’s award chart is the short-haul upgrades from Economy to Business class (Dubai and Tel Aviv are both considered short-haul) that are priced at 10,000 points (sometimes even these are discounted).
You can access Finnair’s page for buying points here.
Note that the sale lasts until June 30, but with the usual 50% bonus.
And here’s the price if you buy the maximum:
The price of a Finnair Plus point under this offer is 0.64 euro cents each (fraction of a cent).
I would only buy Finnair Plus points if I were 100% sure I’d be able to use them for short-haul upgrades or business awards where they are excellent value compared to paid upgrade prices or paying for business class outright.
Here are the terms and conditions of this offer:
Transactions must be completed between 16 June (00:00:01 EEST) and 30 June (23:59:59 EEST) 2020 to receive the Finnair Plus Points bonus. Finnair Plus Points bonus is only eligible on transactions of 5,000 Points and above. Whilst the promotion is active (16 – 30 June) Finnair Plus Members may purchase or receive up to 200,000 Points in the calendar year. Finnair Plus Points will be awarded to the recipient. All other Buy/Gift Finnair Plus Points terms and conditions apply.