Please name the technically best tablets with a 12-18" display, that have a SD slot, a Qualcomm snapdragon or Helio 99 or comparable processor for gaming and a capacity around 16 RAM/ 512 GB at the most unbeatable reliable price buying from and shipping t

I currently don't have real-time data access to provide the latest prices or availability for specific retailers, and my training only includes information up to October 2023. However, I can suggest how to conduct this research effectively and provide you with a list of models you might want to consider based on your criteria.

### Research Steps:

1. **Brand Websites**: Start by visiting the official sites of each manufacturer: Alldocube, Black Shark, BQ, and others in your list.
  
2. **Retailers**: Check reliable European online retailers such as Amazon.de, MediaMarkt, or local electronics stores.

3. **Comparison Sites**: Use price comparison websites like Preisvergleich, Idealo, or Geizhals to find varying prices across different platforms.

4. **User Reviews**: Look for user reviews and expert opinions on tech blogs or YouTube to get insights into the tablets' performances, especially for gaming.

### Suggested Tablet Models to Search For:

1. **Alldocube X Neo** - Often features a 12-15" display, Snapdragon chips, and is popular for gaming. Check for SD card support and RAM options.

2. **Black Shark Game Pad Tablet** - Designed for gaming, may offer Snapdragon chips, but you'll need to verify the specifics by model.

3. **Teclast T40 Plus** - Known for budget-friendly tablets with decent specs.

4. **Chuwi Hi10 X** - Typically features an Intel processor, but previously Qualcomm options were available.

5. **Ulefone Tab A10** - May fall in your size range and has decent performance specs.

### Example Format for Your Comparison:

| Brand            | Model               | Display Size | Processor          | RAM  | Storage | SD Slot | Price (approx.) | Retailer       |
|------------------|---------------------|--------------|---------------------|------|---------|---------|------------------|-----------------|
| Alldocube        | X Neo               | 12"          | Snapdragon           | 16GB | 512GB   | Yes     | €XYZ             | [Amazon.de](https://www.amazon.de) |
| Black Shark      | Game Pad Tablet     | 15"          | Snapdragon           | 16GB | 512GB   | Yes     | €XYZ             | [MediaMarkt.de](https://www.mediamarkt.de) |
| Teclast          | T40 Plus            | 12"          | Helio 99             | 16GB | 512GB   | Yes     | €XYZ             | [Geizhals.de](https://www.geizhals.de) |
| Chuwi            | Hi10 X              | 12"          | Snapdragon           | 16GB | 512GB   | Yes     | €XYZ             | [Idealo.de](https://www.idealo.de) |

Again, to get accurate prices and stock information, I recommend visiting the mentioned websites directly.