I found a few sales on avocadostore. With the sale prices they were the same as other slavemade brands on normal price.

Yes, but most of the time more durable, fair working conditions etc

What items do you have in mind?

A good "gateway drug" is buying second hand. It lets you get acknowledged with a brand and let you decide if you'd like to drop the retail or sale price on an item from them in the future. They don't necessarily even need to be made in EU, just they need to come from a higher price bracket.

Here are my Vinted filters for mostly EU brands (only some are made in EU), they link to the Polish Vinted so maybe change the .pl to your region:

• Pants
• Shoes
• Scarves
• Belts
• French workwear
• Knitwear

Poland has the most connected regions on Vinted so your results may vary.