Issuing a last time buy (LTB) to customers can be a useful strategy for managing end-of-life (EOL) or discontinued products. However, there are certain situations where it may not be a good idea to issue an LTB to customers. Here are a few scenarios where an LTB may not be a good idea:

1. Limited demand: If the demand for the product is low or if the product is not in high demand, issuing an LTB may not make sense. This is because the cost of producing the product may be higher than the revenue generated from the sale of the product.
2. High cost: If the cost of producing the product is high, issuing an LTB may not be a good idea. This is because the cost of producing the product may be higher than the revenue generated from the sale of the product.
3. Obsolescence: If the product is becoming obsolete or if there is a better alternative product available in the market, issuing an LTB may not be a good idea.. This is because customers may not be interested in purchasing an outdated product.
4. Uncertain future demand: If the future demand for the product is uncertain or if the product is likely to be replaced by a newer version in the near future, issuing an LTB may not be a good idea.
5. Customer preference: If customers have expressed a preference for a different product or if there is a new trend in the market, issuing an LTB for an older product may not be a good idea.

In general, issuing an LTB should be based on careful analysis of market demand, production costs, and future trends. If these factors do not support the issuance of an LTB, it may be better to explore other strategies for managing end-of-life products.