Hello Peter
I'll copy you an answer here that answers your question.
Alternatively, there is the TN-247 for 3,000 or 2,300 pages. Background of the "small" toners: Since the print quality decreases with the consumption and the age, it makes sense that "average printers" replace the toners every 1-2 years.
Personally, I don't usually buy a set with the same toners, but rather as needed, for example: TN-247BK (large toner because black is needed for every print) and the colours CMY with TN-243 (because only about a quarter of my prints are coloured, as I have deliberately set "B/W - monochrome" as the default). This is how I "save" the most and ultimately have no investment ruin if the thing unexpectedly gives up the ghost.
Hello Carole
ChatGPT can give you very good information.
I searched for the TN-243 multipack. Here are the results.
Best regards Thomas
The Brother TN-243 multipack toner (or the individual variants e.g. Brother TN-243BK for black, Brother TN-243C for cyan, Brother TN-243M for magenta, Brother TN-243Y for yellow) is compatible with the following selected Brother printer models:
Compatible models
- Brother DCP-L3510CDW - according to manufacturer list. 
- Brother DCP-L3517CDW - also mentioned. 
- Brother DCP-L3550CDW - also listed. 
- Brother HL-L3210CW - compatible for colour printer series. 
- Brother HL-L3230CDW - also listed. 
- Brother HL-L3270CDW - also named. 
- Brother MFC-L3710CW - also listed. 
- Brother MFC-L3730CDN - also listed. 
- Brother MFC-L3750CDW - also listed. 
- Brother MFC-L3770CDW - likewise. 
Notes
- These are colour laser multifunctional devices or colour printers from Brother in which this toner series is used.
- If your printer model does not appear in this list, we recommend checking the manual or the Brother website to see whether "TN-243" (or the variant for colour: TN-243C/M/Y or black: TN-243BK) is specified as a consumable.
I don't have the impression that the printer uses a lot of toner. However, I don't have a comparison. As you know, it's always the same with printers: low purchase price and high toner costs. Otherwise I'm actually satisfied, it prints what I want in satisfactory quality.
What is your question?
I have been using the MFC-L3750CDW for more than two years and can recommend it with a clear conscience.
However, we are not frequent printers so that we can give a comprehensive verdict on the print quality. We bought it as a replacement for an inkjet printer and have not regretted this decision.
The simple Google search helps there too. More service at no extra cost
Brother offers the PRINT AirBag for 15,000 pages on the following models. This free service covers all maintenance and consumables costs for up to three years.
Le pilote d'imprimante Brother offre cette fonction. Le pilote d'imprimante Windows (Built in) ne dispose pas de cette fonction.
https://support.brother.com/g...
Can the scanner recognise OCR fonts?
-> Yes, but it only outputs a TXT file as the result. However, OCR recognition is extremely slow. Patience is required.
Is double-sided scanning possible?
-> No, not possible.