Price starts at $800 + content costs.
This includes: improving the structure of the site, optimizing the page for low-competitive keywords, fixing technical errors, publishing articles and link building.
Content is created by native speakers. The cost of one article goes from $100 to $300, depending on the volume, subject and GEO. German writers usually set prices 1.5-2 times higher than American and French authors. If the topic is popular and there are a lot of authors, you can find a reasonable price for 1000 words. The rates of authors are 2-3 times higher if the niche is specialized.