A short look on Aliexpress also yielded the Siglent 3055X-E for a bit above 500 €- you are sure you really NEED 6.5 digits?
The 500EUR equipment at AliExpress would turn into a $858 purchase, not including any shipping and broker fees:
500EUR -> 550USD (nice round figure)
Import tax from China at 30%: $165 for a total of $715
VAT at 20% using the value above: $143 (yes, we pay tax on tax)
Total: $858
The $950 quote already includes VAT at 20%. It is also possible to pay this amount in 9 installments with a 20% total interest over the purchase price (our official yearly inflation is 65% and de-facto inflation is above 100% so it may make sense to purchase it that way).
There's also the issue that it is not possible for a Turkish resident to purchase anything on a personal basis at AliExpress if item value is over 150 EUR (you simply can't check-out). This is due to the law change two years ago where personal import allowance was reduced from 1500 EUR to 150 EUR. Well, with other sites it is TECHNICALLY possible to place an order but then when the item arrives at customs, the above calculation takes place and there's the MANDATORY requirement of using a customs broker which generally means exorbitant fees and cumbersome bureaucracy. AliExpress knows this well and simply just allows the personal limit (where we get charged the import tax only, no VAT is involved).
I am assuming the OP is a business customer but I don't know if it is possible to purchase as a business buyer at AliExpress and overcome the 150 EUR personal purchase limit.
Here are the item links for the local authorized Siglent Distributor:
SDM3065X:
https://www.kamitekno.com/siglent-sdm3065x-6-12-dijit-masaustu-dijital-multimetre In stock, $950 (20% VAT included)
SDM3055:
https://www.kamitekno.com/siglent-sdm3055-5-12-haneli-tezgah-ustu-dijital-multimetre-true-rms 4-6 weeks delivery time, $699.87 (20% VAT included)
Would the suggestion change (SDM3055 vs SDM 3065X) under these conditions?